Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Subsidiary Purchases of Common Stock (Details)

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Stockholders' Equity - Subsidiary Purchases of Common Stock (Details) - Tripadvisor - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Equity, Class of Treasury Stock [Line Items]    
Treasury shares acquired 4,707,450  
Payment for shares repurchased $ 115  
Stock repurchase remaining amount authorized   $ 75